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CVE-2026-48903

Joomla! Framework - [20260519] - Inadequate content filtering within the checkAttribute filter code.

MEDIUM
6.1
CVSS Score
Published: May 26, 2026 at 04:46 PM UTC
Updated: July 24, 2026 at 11:23 AM UTC
1 product affected across 1 vendorJoomla!

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

Inadequate content filtering within the checkAttribute methods leads to XSS vulnerabilities in various components.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Joomla!· Joomladrupal
95%
3.0.0 ≤ v < 5.4.66.0.0 ≤ v < 6.1.11.0.0-3.0.54.0.0-4.0.1
Affected range stops below 5.4.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://developer.joomla.org/security-centre/1051-20260519-framework-inadequate-content-filtering-within-the-checkattribute-filter-code.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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